Hydromycoflora of thirty-one lakes in Ełk Lake District and adjacent waters with reference to the chemistry of the environment

The mycoflora of Lake Ełk and thirty-one adjacent lakes and six rivers was studied. Samples of water were collected in 1987-1991 for hydrochemical analysis and determination of fungi species. In total 123 species of fungi were found in these water bodies, including 9 species reported for the first time from Poland

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Chitinophilic zoosporic fungi in various types of water bodies

Acta Mycologica ◽

10.5586/am.1998.004 ◽

2014 ◽

Vol 33 (1) ◽

pp. 43-58 ◽

Cited By ~ 6

Author(s):

Bazyli Czeczuga ◽

Anna Godlewska

Keyword(s):

New Records ◽

Water Bodies ◽

Hydrochemical Analysis ◽

Potato Beetle ◽

Zoosporic Fungi ◽

First Time

Chitinophilic fungi in various types of water bodies (slough, pond, beach pool, two lakes and two rivers) were studied. Samples of water were collected every other month for hydrochemical analysis and once a month ( 1992 - 1994) in order to determine the fungus content. The wings of dragonfly and flies, carapaces of crayfish and potato beetle and the fructification of two mushrooms were used as bait. Thirty species of chitinophilic fungi were found in various types of water bodiss. Cytriomyces annulatus, Entophlyctis crenata, Obelidium megarrhizum, Rhopalophlyctis sareoptoides, Achlya colorata, A. megasperma and Dictyuchus monosporus represent new records as chitinophilic fungi. However, Entophlyctis crenata, Obelidium megarrhizum and Podochytrium chitinophilum reported for the first time from Poland.

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Aquatic fungi in the Lake Sejny complex

Acta Mycologica ◽

10.5586/am.1996.003 ◽

2014 ◽

Vol 31 (1) ◽

pp. 33-44 ◽

Cited By ~ 1

Author(s):

Bazyli Czeczuga

Keyword(s):

Aquatic Fungi ◽

Hydrochemical Analysis ◽

First Time

The mycoflora of the Lake Sejny complex was studied. Samples of water were collected in 1990-1991 for hydrochemical analysis and determination of fungi species. In total 69 species of fungi reported for the first time from Poland (Myzocylium vermicolum, Angulospora aquatica, Zoophthora rhizospora).

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Pythium species in 13 various types of water bodies of N-E Poland

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.2001.009 ◽

2014 ◽

Vol 70 (1) ◽

pp. 61-69 ◽

Cited By ~ 2

Author(s):

Bazyli Czeczuga ◽

Anna Snarska

Keyword(s):

Environmental Factors ◽

Water Bodies ◽

Pythium Species ◽

Hydrochemical Analysis ◽

Number Of Species ◽

First Time ◽

Pythium Acanthicum

Pythium species and environmental factors in various types of water bodies (2 springs, 2 rivers, 3 ponds and 6 different trophic lakes) were studied. Samples of water were collected every two months (springs, rivers, ponds) and every three months (lakes) in the years 1996-1999 for hydrochemical analysis and in order to determine the Pythium species content. From springs rivers and ponds collected were also ice blocks for determinations of presence of Pythium species. Buckwheatand hemp-seeds, cellophane and snake exuviae were used as bait. Forty-five species of Pythium were found in various types of water bodies. Pythium acanthicum, P. complectens, P. complens, P. diameson, P. dissimile, P. elongatum, P. lucens, P. megalacanthum, P. nagae, P. oedochilum, P. oryzae, P. palingenes, P. periilum and P. polysporum were recorded for the first time in Poland. The largest mean number of species was observed in spring Cypisek, a bit fewer in spring Jaroszówka and lake Białe (oligotrophic-like waters). The lowest mean number of Pythium species was noted in pond Akcent and Pałacowy (polytrophic waters). In all types of water bodies the higest mean number of species was found in winter, and the lowest in summer.

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To the flora of сonjugates (Streptophyta, Conjugatophyceae) of the Valdai District area of the National Park «Valdaiskiy» (Novgorod Region, Russia)

Novosti sistematiki nizshikh rastenii ◽

10.31111/nsnr/2014.48.81 ◽

2014 ◽

Vol 48 ◽

pp. 81-88

Author(s):

A. F. Luknitskaya

Keyword(s):

Species Distribution ◽

National Park ◽

Species Abundance ◽

Water Bodies ◽

Number Of Species ◽

First Time

76 species, 3 varieties and 1 form from 21 genera of Streptophyta, Conjugatophyceae (Actinotaenium, Bambusina, Closterium, Cosmarium, Cylindrocystis, Euastrum, Gonatozygon, Haplotaenium, Micrasterias, Mougeotia, Netrium, Penium, Planotaenium, Pleurotaenium, Raphidiastrum, Spirogyra, Spirotaenia, Staurastrum, Staurodesmus, Tetmemorus, Xanthidium) were found in the basins of the Valdai District area of the National Park «Valdaiskiy» (Novgorod Region, Russia). The list of species is annotated with data on the species distribution in 55 collecting sites of 29 water bodies of the national park, and species abundance in collected samples according to Luknitskaya (2009). Among above mentioned genera, the genus Cosmarium is represented by the greatest number of species (20). Staurastrum chaetoceros has been found for the first time for the Novgorod Region.

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Disability as a social phenomenon

10.33920/med-03-2007-01 ◽

2020 ◽

pp. 22-38

Author(s):

Natalia Guseva ◽

Vitaliy Berdutin

Keyword(s):

Social Protection ◽

Russian Society ◽

Stage Model ◽

High Quality ◽

Rehabilitation Programs ◽

Current State ◽

The Social ◽

Consistent Solution ◽

First Time

At present, the problem of establishing disability is a point at issue in Russia. Despite the fact that medical criteria for disability are being developed very actively, high-quality methods for assessing social hallmarks are still lacking. Since disability is a phenomenon inherent in any society, each state forms a social and economic policy for people with disabilities in accordance with its level of development, priorities and opportunities. We have proposed a three-stage model, which includes a system for the consistent solution of the main tasks aimed at studying the causes and consequences of the problems encountered today in the social protection of citizens with health problems. The article shows why the existing approaches to the determination of disability and rehabilitation programs do not correspond to the current state of Russian society and why a decrease in the rate of persons recognized as disabled for the first time does not indicate an improvement in the health of the population. The authors proposed a number of measures with a view to correcting the situation according to the results of the study.

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Phytochemical Constituents of Annona reticulata and their Cytotoxic Activity

Letters in Organic Chemistry ◽

10.2174/1570178616666190724123004 ◽

2020 ◽

Vol 17 (3) ◽

pp. 206-210

Author(s):

Ty Viet Pham ◽

Thang Quoc Le ◽

Anh Tuan Le ◽

Hung Quoc Vo ◽

Duc Viet Ho

Keyword(s):

Cytotoxic Activity ◽

Cell Lines ◽

Structural Determination ◽

Phytochemical Investigation ◽

Ic50 Values ◽

Phytochemical Constituents ◽

First Time ◽

Annona Reticulata

A phytochemical investigation of the leaves of Annona reticulata led to the isolation and structural determination of β-sitosterol (1), ent-pimara-8(14),15-dien-19-oic acid (2), ent-pimara- 8(14),15-dien-19-ol (3), quercetin (4), quercetin 3-O-α-L-arabinopyranoside (5), and a mixture of quercetin 3-O-β-D-galactopyranoside (6a) and quercetin 3-O-β-D-glucopyranoside (6b). Of these, compounds 2 and 3 were isolated from the genus Annona for the first time. Compound 3 showed strong cytotoxicity against SK-LU-1 and SW626 cell lines with IC50 values of 17.64 ± 1.07 and 19.79 ± 1.41 μg mL-1, respectively.

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Development of an HPLC-UV Method for Quantification of Stattic

Current Pharmaceutical Analysis ◽

10.2174/1573412914666180523092957 ◽

2019 ◽

Vol 15 (6) ◽

pp. 568-573

Author(s):

Soheil Sedaghat ◽

Ommoleila Molavi ◽

Akram Faridi ◽

Ali Shayanfar ◽

Mohammad Reza Rashidi

Keyword(s):

High Performance ◽

Accurate Method ◽

Plasma Samples ◽

Promising Target ◽

Relative Standard ◽

Dimerization Inhibitor ◽

Oncogenic Protein ◽

First Time ◽

Transcription 3

Background: Signal transducer and activator of transcription 3 (STAT3), an oncogenic protein found constitutively active in many types of human malignancies, is considered to be a promising target for cancer therapy. Objective: In this study for the first time, a simple and accurate method has been developed for the determination of a STAT3 dimerization inhibitor called stattic in aqueous and plasma samples. Methods: A reverse-phase high-performance liquid chromatography (RP-HPLC) composed of C18 column as stationary phase, and the mixture of acetonitrile (60%) and water (40%) as mobile phase with a UV detection at 215 nm were applied for quantification of stattic. The developed method was validated by Food and Drug Administration (FDA) guideline. Results: The method provided a linear range between 1-40 and 2.5-40 µg mL-1 for aqueous and plasma samples, respectively, with a correlation coefficient of 0.999. The accuracy (as recovery) of the developed method was found to be between 95-105% for aqueous medium and 85-115% for plasma samples. The precision (as relative standard deviation) for aqueous and plasma samples was less than 6% and 15%, respectively. The sensitivity of the developed method based on FDA guideline was 1 µg mL-1 for aqueous and 2.5 µg mL-1 for plasma samples. Conclusion: These results show that the established method is a fast and accurate quantification for stattic in aqueous and plasma samples.

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Carbon dots derived from Fusobacterium nucleatum for intracellular determination of Fe3+ and bioimaging both in vitro and in vivo

Analytical Methods ◽

10.1039/d1ay00020a ◽

2021 ◽

Author(s):

Lijuan Liu ◽

Shengting Zhang ◽

Xiaodan Zheng ◽

Hongmei Li ◽

Qi Chen ◽

...

Keyword(s):

Carbon Dots ◽

Fusobacterium Nucleatum ◽

Living Cells ◽

First Time ◽

Fluorescent Carbon Dots ◽

Fluorescent Carbon

Fusobacterium nucleatum has been employed for the first time to synthesize fluorescent carbon dots which could be applied for the determination of Fe3+ ions in living cells and bioimaging in vitro and in vivo with excellent biocompatibility.

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Experimental investigation to characterize simple versus multi scaling analysis of hydraulic conductivity at a mesoscale

Stochastic Environmental Research and Risk Assessment ◽

10.1007/s00477-021-02079-w ◽

2021 ◽

Author(s):

Guglielmo Federico Antonio Brunetti ◽

Samuele De Bartolo ◽

Carmine Fallico ◽

Ferdinando Frega ◽

Maria Fernanda Rivera Velásquez ◽

...

Keyword(s):

Hydraulic Conductivity ◽

Spatial Variability ◽

Hydraulic Properties ◽

Scaling Laws ◽

Scaling Analysis ◽

Field Scale ◽

Porous Formation ◽

Proper Design ◽

First Time

AbstractThe spatial variability of the aquifers' hydraulic properties can be satisfactorily described by means of scaling laws. The latter enable one to relate the small (typically laboratory) scale to the larger (typically formation/regional) ones, therefore leading de facto to an upscaling procedure. In the present study, we are concerned with the spatial variability of the hydraulic conductivity K into a strongly heterogeneous porous formation. A strategy, allowing one to identify correctly the single/multiple scaling of K, is applied for the first time to a large caisson, where the medium was packed. In particular, we show how to identify the various scaling ranges with special emphasis on the determination of the related cut-off limits. Finally, we illustrate how the heterogeneity enhances with the increasing scale of observation, by identifying the proper law accounting for the transition from the laboratory to the field scale. Results of the present study are of paramount utility for the proper design of pumping tests in formations where the degree of spatial variability of the hydraulic conductivity does not allow regarding them as “weakly heterogeneous”, as well as for the study of dispersion mechanisms.

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Potentiometric Response of Solid-State Sensors Based on Ferric Phosphate for Iron(III) Determination

Sensors ◽

10.3390/s21051612 ◽

2021 ◽

Vol 21 (5) ◽

pp. 1612

Author(s):

Andrea Paut ◽

Ante Prkić ◽

Ivana Mitar ◽

Perica Bošković ◽

Dražan Jozić ◽

...

Keyword(s):

Silver Sulfide ◽

Potential Change ◽

Linear Potential ◽

Response Characteristics ◽

Potentiometric Response ◽

Best Response ◽

Body Design ◽

Long Lifetime ◽

First Time

A novel ion-selective electrode with membranes based on iron(III) phosphate and silver sulfide integrated into a completely new electrode body design has been developed for the determination of iron(III) cations. The best response characteristics with linear potential change were found in the iron(III) concentration range from 3.97× 10−5 to 10−2 mol L−1. The detection limit was found to be 2.41× 10−5 mol L−1 with a slope of –20.53 ± 0.63 and regression coefficient of 0.9925, while the quantification limit was 3.97× 10−5 M. The potential change per concentration decade ranged from –13.59 ± 0.54 to –20.53 ± 1.56 for Electrode Body 1 (EB1) and from –17.28 ± 1.04 to –24 ± 1.87 for Electrode Body 2 (EB2), which is presented for the first time in this work. The prepared electrode has a long lifetime and the ability to detect changes in the concentration of iron cations within 20 s. Membrane M1 showed high recoveries in the determination of iron cations in iron(III) standard solutions (98.2–101.2%) as well as in two different pharmaceuticals (98.6–106.5%). This proves that this type of sensor is applicable in the determination of ferric cations in unknown samples, and the fact that all sensor parts are completely manufactured in our laboratory proves the simplicity of the method.

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